DEFERRED CHARGES AND OTHER ASSETS, NET (Tables)

12 Months Ended

Dec. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of deferred charges and other assets, net

Deferred charges and other assets, net consisted of the following:  

(in millions)	December 31, 2021		December 31, 2020
Deferred turnaround costs, net	$	537.0	$	598.2
Catalyst, net (a)	166.8		155.2
Environmental credits	41.3		39.6
Linefill	27.4		27.4
Pension plan assets	20.7		21.2
Intangible assets, net	0.5		0.5
Other	20.1		20.6
Total deferred charges and other assets, net	$	813.8	$	862.7

(a) Catalyst, net includes $113.0 million and $115.2 million of indefinite-lived precious metal catalysts (both owned or financed as part of existing catalyst financing arrangements) as of December 31, 2021 and December 31, 2020, respectively.

Intangible assets, net

Intangible assets, net primarily consists of permits and emission credits. Our net balance as of December 31, 2021 and December 31, 2020 is shown below:

(in millions)	December 31, 2021		December 31, 2020
Intangible assets - gross	$	4.0	$	4.0
Accumulated amortization	(3.5)		(3.5)
Intangible assets - net	$	0.5	$	0.5